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A supply of copper is to be placed on a wood raft. The raft has a surface area of 28.0 m2 and a thickness 1.75 meter.
(a) Determine the maximum weight of the copper that can be located on the raft thus that the raft will not sink below the water?
(b) Find the volume of this maximum amount of copper?
Two small plastic spheres each have a mass of 2.0 {\rm g}and a charge of-50.0{\rm{ {\rm nC}}}. They are placed2.0 {\rm cm}apart. By what factoris the electric force on a sphere larger than its weight?
the 1994 winter olympics include theaerials competition in skiing. in this event skiers speed down aramp that slopes sharply upward at the end. what isthe skiers launch speed
A baseball leaves the batter's bat at 30 degrees above horizontal. with what speed does the ball leave the bat
Two nuclei with the same mass number are known as isobars. Calculate the binding energy per nucleon for these two isobars
A solid conducting ball with charge +2Q is placed inside aconducting shell. how much charge is on the outer surface of the shell
A uniform sphere with mass 57.0kg is held with its center at the origin, What is the magnitude of the net gravitational force due to these objects on a third uniform sphere with mass 0.510kg placed at the point x= 4.00m, y = 0
Two small metallic spheres, each of mass 0.30g, are suspended as pendulums by light strings from a common point, calculate the magnitude of the charge on each sphere
using energy conservations how would your calculated final velocity change if you threw a ball off a building straight
A high driver of mass 65.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting at rest. what average upward force did the water exert on her
You plan to project an inverted image 30.0 cm to the right of an object. You have a diverging lens with focal length -4.00 cm located 6.20 cm to the right of the object. What is the focal length of the second lens
an object floats in water with 55 of its volume submerged. what is its approximate density?a 450 kgm3b 550 kgm3c 1000
A 65.0 {\rm kg} person is put on an exercise program by a physicaltherapist, the goal being to burn up 510 food calories in eachdaily session. How many jumps should the person do persession
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